Requirements

If you don't use HTML5, adding "data" attributes to your HTML4 or XHTML pages might make them fail W3C markup validation. However, this shouldn't create any issues for web browsers or other user agents.

Installation using the jquery-rails gem

For automated installation in Rails, use the "jquery-rails" gem. Place this in your Gemfile:

gem'jquery-rails'

And run:

$ bundle install

Require both jquery and jquery_ujs into your application.js manifest.

//= require jquery//= require jquery_ujs

Installation using Bower

Run bower install jquery-ujs --save to install the jquery-ujs package.